Best available cof



Jan. 15, 1929. 1,698,918

L. s. KUBIAC ELECTRI C ARC LAMP Filed Nov. 26, 1927 4 Sheets-Sheet l gnwntoz LesZ erS.Kubiac, "hr/v5.56;-

Jan. 15, 1929. 1,698,918

- L. s. KUBIAC ELECTRI C ARC LAMP Filed Nov. 26, 1927 4 Sheets-Sheet 2 Lester 5.11305 iac,

Jan. 15, 1929.

L. S. 'KUBIAC ELECTRIC ARC LAMP 4 Sheets-Sheet Filed Nov. 26, 1927 gnvc-ulot LesZ'er45'.Kubiac,

WITNESS Jan. 15, 1929. 1,698,918

L. s. KUBIAC ELECTRI C ARC LAMP Filed Nov. 26, 1927 4 Sheets-Sheet 4 Z6 7 Snow Hot 76 29 LesierS. ubiac,

Patented Jan. 15, 1929.

UNITED STATES PATENT OFFICE.

LESTER S. KUBIAC, OF YOUNGSTOWN, OHIO, ASSIGNOR TO THE PHOTOGENIC MACHINE COMPANY, OF YOUNGSTOWN, OHIO, A CORPORATION OF OHIO.

ELECTRIC-ARC LAMP.

Application filed November 26, 1927. Serial No. 235,808.

This invention relates to electric arc lamps, and more particularly to the multiple type of lamp, involving an underslung. construction, and including certain of the basic principles shown in my application Serial No. 147,206, filed November 9, 1926, and allowed May 6, 1927, but involving various improvements suggested by test and experience, the primary improvements probably residing in an arrangement of operating bars and levers so assembled thatthe travel of the carbons or electrodes will be materiallyreduced as compared with the travel of armature of'the solenoi d,.-the relative travel of these vtwo elements being readily adjustable to any predeterminedvproportions.

Ihave learned from-experience and practice thatthe starting and stopping of the carbons (in other words, the separation and closing of the carbons for the, purpose of estabhshin and terminating the arc) may be more gent yv eiiectedby communicating or transmitting the movement of the armature to the carbons through the medium of alever slidably and loosely connected, intermediate its ends, with the clutch bar, one end of this lever being connected with thearniature' and the other end having a fixedpivotfl I also retain in the combination the counter-weight 21 shown in my former application, but necessarily somewhat differently mounted.. q

A practical embodiment of my invention isshown in the accompanying drawings, in

whichFig; 1 is afront elevation, Fig.- 2 is: an end elevation with 'the casingshown, in

section, and disclosing one coil o'fthe rheostat or resisting elements,- disposed at therear ofthe casing enclosing the arc lights; Fig. 3 is a plan view, partially. inrsection, on line 3-3 Fig.- 1; Fig..4 is. a fragmentaryvieml showing in detail the general arrangement and assembly of the. various parts and elements of the operating mechanism; Fig. 5 is a fragmentary, front view, similar in some respects to Fig, 1, but more in detail, and also showing the carbons separated instead of;

closed as in Fig.1.

I house the mechanism of my invention in what may be termed an open supporting frame, designated, generally, as F, and con sisting of the top or cap plate 1, the bottom or base plate 2, the back wall 3, and the four upri ht corner posts 4-4, which tie the cap and ase plates 1 and 2 together.

'is the clutch extension 11-11. Fig. 3.

Secured to the lower face of the bar 10 are the ordinary dash posts 12-12, and the dash pot pistons 13-13 areswingingly secured to the upper face of the base plate 2 of the frame,

' Depending fromeach of the lateral extensions 11-11 is a bolt or pin 14 provided at its lower end with a head 15, and upon which ismounted a coil spring 16.

i Slidably mounted upon bolts 14-14, and

above the springs 16-16, is a flat bar 17 secured to the bolts by the nuts 18-18.

This is the same construction as shown in Fig. 6 of my former application, but inverse- ;ly mounted.

'lheglower end of the armature 19 is secured Y to the'upper face of the flat bar 17.

Also,;depending from the center of the bar 10 is a slotted post 20, the purpose of which will appear later. Rigidly secured to the cap and base plates 1 an 2 of the frame, and adjacent the front edges thereof, are the two upright columns or posts 21-21.

Rigidly mounted upon these two columns,

substantially on a level with the solenoid bracket 6 on the columns 5-5, is a crossbar-22, carrying. a depending slotted post 23, the purposeof which will also appear later.

Slidably mountednpon columns 21-21, adjacent the base plate 2, by means of the relatively lon bar 25, vcarrying at each end a clutch element 26-26, adapted to engage the oppositely disposed upon carbons 27-27. The use of the clutch bar being common to both carbons, and being provided with its long guide bearings, insures absolutely synchronous movementof the carbons, as well as absolute alignmentof travel of the same. Rigidly secured to the upper face of the 1 tubular guide bearings 24-24,

clutch bar 25 is the upstanding post 28 carrying an open slot at its upper end.

Also, rigidly secured to the base plate 2 of the frame is a similar post 29.

Swingingly and slidably secured to the upstanding post 28 carried by the clutch bar 25, by means of the central longitudinal slot- 30, is the lever 31, one end of which is swingingly connected with the upstanding slotted post 29 carried by the base plate 2, and the other end is loosely connected 'with the depending slottcd post 20 carried by the bar 10.

Also pivoted to the depending slotted post 23 carried by the cross-bar 22, is the lever 32, carrying at one end the counter-weight 33, and having its opposite end pivoted to the upper end of the link 34, the lower end of which link is similarly connected with the lever-31 carried in the post 28.

Slidably mounted upon thecorner posts 44 of the frame are the oppositely disposed carbon holders 35-35 to wh-ich the upper carbons 27-'27 are secured by screws36-36.

Forthe purpose of insulating the carbons and operating. elements from the frame of the device, I use the plates or sheets-3737 of asbestos or other suitable material. Fig; 5.

Firmly secured to, and suspended from, the base plate 20f the frame. is the supporting rod 38, carryingat its-lower end an adjustable cross-bar 39 having a relatively long tubular guide bearing 40 held in position by the screw 41, said cross-bar being provided at each end with a carbon holder 42 to which the lower carbons 43 43 are attached by screws 44-44.

The rheostat, or resistin elements, isrepresented by 45, and may e provided with any ordinary shunt switch to regulate the strength of the current passing through the same.

The operation of my device, briefly stated, is substantially as followsz When the solenoid is energized,the armature will travel upwardly inthe-solenoid, carrying with it the little flat bar 17 against the pressure of the springs 1616, but without moving the bar 10, until the compression of the springs is sutlicient to overcome the gravity resistance of the bar 10 and its equipment, less the gravity weight of the counterweight 33 (which will then move downwardly), at which time the bar 10 will be lifted up. This willlift the rear end of the lever 31 which is swingingly and slidably secured to the post 28 carried by the clutch bar 25, which will also lift the clutch bar, and the clutch elements carried by this bar will engage and lift the upper carbons and establish the arc.

It is obvious that in this operation the clutch bar and the carbons will travel a very materially lesser distance than the armature, causing the carbons to bemore slowly and gently separated, a result much to be desired in the building up of the arc.

Also, the action of the springs 16-16 will contribute very materially to this result.

The relative-movement of the various operating elements are so adjusted that when the armature reaches what is known as the point of magnetic balance in the solenoid, the arc will be'of proper length for service.

As the carbons burn away, however, the length of the are gradually increases and the strength of the current will correspondinglv decrease until the magnetic strength of the solenoid is no longer sufiicient to carrv its load, at which timethc armature will begin to drop, thus permitting the clutch bar 25 to fall, but nnderthe cushioning effect of the springs 1616. andgently retarded, also, by the gravity resistance of the weight 33 (which will then move upwardly), until the clutch elements 2626 comein contact with the insulating plates or sheets 37-37, which will release the grip" on the upper carbons and permit them to' fall until they 'again come in contact with the lower carbons, thus, theoretically, eliminating thearc and extinguishin the light, althou'gh the operation is so rapid that this fact is not perceptible to the eye. it

As soon asthe two carbons again come in contact the circuit is closed, the current again flows to, and energizes, the solenoid, and this cycle of o eration is repeated so long as the lights are burning;

I claim:

1. In an arc lamp, a carbon control mechanism comprisin '--a horizontal lifting bar slidably mounte 'upon upri ht supports and carrying at eachend a clutchelement adapted to engage a carbon, and means for actuating sai'd lifting 'bar,said actuatin means including a solenoid unit, a plate also slidably monnted .upon separateuprigh't supports and controlled'by said solenoid unit,

and a lever having one end loosel'y connected with said plate, a loose connectiomintermediate its ends, with said liftin bar, and its other end pivoted on the opposite side of said lifting bar from said plate.

2. In an arc lamp, a carbon control mechanism comprising a' horizontal lifting bar slidably mounted .upon upright supports and carrying at each end a clutch elemeht'adapt ed to engage a carbon, and means for actuating said lifting bar,said actuating means including a solenoid unit, a plate also slidably mounted upon separate upright supports and controled by said solenoid unit, a lever having one end loosely connected with said plate, a loose connection, intermediate its ends, with said lifting bar, and its other end pivoted on the opposite side of said lifting bar from said plate, and another lever pivoted intermediate its ends above said first mentioned lever, and carrying at one end a counter-weight, and having at its other end a loose link connection with said first mention ed lever.

3. In an arc lamp, a carbon control mechanism comprising a horizontal lifting bar slidably mounted upon upright supports and carrying at each end a clutch element adapted to engage a carbon, and means for actuating said lifting bar,said actuating means including a solenoid unit, a plate also slidably mounted upon separate upright supports and connected to the lower end of the armature of said solenoid unit, and a lever having one end loosely connected with said plate, a loose connection, intermediate its ends, with said lifting bar, and its opposite end pivoted on the opposite side of said lifting bar from said plate.

4. In an arc lamp, a carbon control mechanism comprising a horizontal lifting bar slidably mounted upon upright supports and carrying at each end a clutch element adapted to engage a carbon, and means for actuating said lifting bar,said actuating means including a solenoid unit, a plate also slidably mounted upon separate upright supports and connected to the lower end of the armature of said solenoid unit, a lever having one end loosely connected with said plate, a loose connection, intermediate its ends, with said lifting bar, and its opposite end pivoted on the opposite side of said lifting bar from said plate, and another lever pivoted intermediate its ends above said first mentioned lever, and carrying at one end a counterweight, and having at its other end a loose link connection with said first mentioned lever.

In witness whereof, I have hereunto aflixed my signature.

LESTER S. KUBIAC. 

